Question

ViewModel:
Class BaseViewModel
{
  public string ViewOnlyProperty{get; set;}
  ...
}

Class VmClass<T,A>:BaseViewModel where T:IVmShared A:IVmSpecific
{
  ...
}

DomainModel:
Class BaseDomainModel
{
  ...
}

Class DomainClass<T,A>:BaseDomainModel where T:IDomainShared A:IDomainSpecific
{
  ...
}

Automapper:

Mapper.CreateMap<BaseDomainModel, BaseViewModel>()
.Include<IDomainClass<IDomainShared,IDomainSpecific>, VmClass<IVmShared,IVmSpecific>>()
// Included other concrete classes implements Domain and View models interfaces
.ForMember(x => x.ViewOnlyProperty, opt => opt.Ignore());

 Mapper.CreateMap<IDomainClass<IDomainShared,IDomainSpecific>, VmClass<IVmShared,IVmSpecific>>()
.ForMember(x => x.ViewOnlyProperty, opt => opt.Ignore()).ReverseMap();

我对ViewModel到域映射具有相同的配置。但是我在Mapper.AssertConfigurationIsValid();

之后得到了以下异常

Unmapped members were found. Review the types and members below.
Add a custom mapping expression, ignore, add a custom resolver, or modify the source/destination type

VmClass`2 -> DomainClass`2 (Source member list)
VmClass`2[[IVmShared],[IVmSpecific]] -> DomainClass`2[[IDomainShared],[IDomainSpecific]] (Source member list)
---------------------------------------------------------------------------------------
ViewOnlyProperty

为什么我在viewmodel属性验证viewModel-＆gt; DomainModel映射时遇到异常，其中目标在基类中根本没有这个属性？

Answer 1

我找到了这个问题的原因。那是：

 Mapper.CreateMap<IDomainClass<IDomainShared,IDomainSpecific>, VmClass<IVmShared,IVmSpecific>>()
.ForMember(x => x.ViewOnlyProperty, opt => opt.Ignore()).ReverseMap();

ReverseMap（）不起作用，因为目标中不存在ViewOnlyProperty。但Automapper试图将“ViewOnlyProperty”从域映射到视图模型，因为反向映射是在同一个CreateMap（）上完成的。通过将映射拆分为：

来解决问题

 Mapper.CreateMap<IDomainClass<IDomainShared,IDomainSpecific>, VmClass<IVmShared,IVmSpecific>>()
.ForMember(x => x.ViewOnlyProperty, opt => opt.Ignore());

 Mapper.CreateMap<VmClass<IVmShared,IVmSpecific>,IDomainClass<IDomainShared,IDomainSpecific>>();

自动映射配置以忽略目标类的基本成员

1 个答案: